117321617581 has 8 divisors (see below), whose sum is σ = 134096564480. Its totient is φ = 100550349648.

The previous prime is 117321617527. The next prime is 117321617599. The reversal of 117321617581 is 185716123711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117321617581 - 2¹⁹ = 117321093293 is a prime.

It is a super-2 number, since 2×117321617581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117321617681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851061 + ... + 979258.

It is an arithmetic number, because the mean of its divisors is an integer number (16762070560).

Almost surely, 2^117321617581 is an apocalyptic number.

It is an amenable number.

117321617581 is a deficient number, since it is larger than the sum of its proper divisors (16774946899).

117321617581 is an equidigital number, since it uses as much as digits as its factorization.

117321617581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839483.

The product of its digits is 70560, while the sum is 43.

The spelling of 117321617581 in words is "one hundred seventeen billion, three hundred twenty-one million, six hundred seventeen thousand, five hundred eighty-one".